New subject: [Bug 55187] winedbg --auto crashes if target process terminates after attaching.

3 Jul 2023


      https://bugs.winehq.org/show_bug.cgi?id=55187
Bug ID: 55187
           Summary: winedbg --auto crashes if target process terminates
                    after attaching.
           Product: Wine
           Version: 8.11
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winedbg
          Assignee: wine-bugs@winehq.org
          Reporter: bernhardu@mailbox.org
      Distribution: ---
Tried to do some investigation of bug 54240.
There MaLauncher.exe hit a unimplemented function, therefore raises a
'windbg --auto' process.
Unfortunately somehow the MaLauncher.exe manages to terminate,
therefore winedbg receives a EXIT_PROCESS_DEBUG_EVENT that sets
dbg_curr_process to NULL, while winedbg is in the middle
of the --auto processing.
Therefore hitting close or show details leads to a crash in winedbg.
Thread 1 received signal SIGSEGV, Segmentation fault.
0x0041bff1 in output_system_info () at programs/winedbg/tgt_active.c:876
876         if (!IsWow64Process( dbg_curr_process->handle, &is_wow64 ))
is_wow64 = FALSE;
(rr) bt
#0  0x0041bff1 in output_system_info () at programs/winedbg/tgt_active.c:876
#1  dbg_active_auto () at programs/winedbg/tgt_active.c:991
#2  0x0043a377 in main () at programs/winedbg/winedbg.c:729
...
(rr) print dbg_curr_process
$1 = (struct dbg_process *) 0x0
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[Bug 55187] New: winedbg --auto crashes if target process terminates after attaching.